Boiler-flue scraper



(No Model.)v

T. BURKE.

I BOILER FLUE SGRAAPER. NQ. 428,714 f. il Patenglg'y 27, 1890.

me Numa verw: co., moro-mno., wAsnmGmu, n. c.

UNITED STATES PATENT OFFICE.

THOMAS BURKE, OE EORDHAM, NEW YORK.

BOlLER-FLUE SCRAPER.

SPECIFICATION forming part of Letters Patent No. 428,714, dated May 27, 1890. Application tiled October 22, 1889. Serial No. 327,820. (No model.)

To all whom it may concern:

Be it known that I, THOMAS BURKE, a citizen of the United States, and a resident of Fordham, county of New York, and State of New York, have invented a new and useful Improvement in Boiler-Tube Scrapers, of which the following is a specification.

This invention relates to a combined brush and scraper for cleaning pipes and tubes, being especially designed for the iiucs and tubes of tubular boilers.

The object of the invention is to provide a series of yielding scrapers which will expand and bear against the sides of the tubes and yield when passing over unyielding obstructions or contracted portions of the s'aidtubes. These series of scrapers are connected together, being formed of a single wire which is bent to form a helix, the coils forming independent Scrapers. l Y

A further object of the invention is the provision of a scraper which will be efficient and perform its Work in a rapid manner Without scoring or scratching' the tubes, and which will not choke or become clogged and will be compact and durable.

The improvement consists in the peculiar construction and combination of parts, which will be hereinafter more fully described and claimed, and which are shown in the accompanying drawings, in which- Figure lis a side view of a scraper embodying my invention. Fig. 2 is a vertical central section on the line X X of Fig. l.

The two head-plates A and C are centrally operated l to receive the rod E, and have iianges A and C', respectively, each plate being held on the rod Eby a pair of nutsc c',

which are placed on opposite sides of and clamp the plates between them.

The helical scraper orbrush B is compressed between the heads A and C, the ends thereof encircling the flanges A and C of the head-plates by having their ends inserted through openings in the flanges A and C,

as shown, and clamped in said openings byjam-screws D. By thus securing the ends of the wire the brush may be very quickly inserted in place between the heads A and C or removed therefrom. The wire'may also be held at its extreme end or some distance therefrom, so that the diametrical size of the brush `may be varied slightly in this way. This fastening is also advantageous in case the brush should be broken, in the event of which it may be quickly removed and replaced by a fresh spring. This brush may be formed from any gage of wire, and is slightly larger in diameter than the head plates, so thatit-s edges will rub against the sides of the tubes. For light workabrush of lightgage wire will beprovided, and for heavy work a brush of heavy-gage wire will be employed. The wire whichv is used in the construction of the brush is of a springy nature,

and is circular in cross-section, so that when n in use it will have a light elastic contact with the interior of the 'liuc or tube, and will thereby accommodate itself to any irregularities of the tube, and in addition to this the brush will not score or scratch the interior of the iiue.

The guide-sleeve G, located at some distance from head-plate C, is connected with said head-plate by rods g, which are between said sleeve and plate C. The rods g are set in iiush with the periphery of pla-te C, so as not to score the tubes.

The brush can be expanded and contracted in diameter by adjusting the nuts e and c on the rod E, as will be readily understood.

I am aware of the construction of the respective Scrapers described and illustrated in Letters Patent to Gladding, No. 264,826; Christoffel, No. 13S,317;Hobday, No. 127,237;

Thomas, No. 390,822, and Coyle, No. 91,523,

rod E between pairs of nuts and having my invention I have signedniyname,inpresflanges A a11dC,tl1ehe1icai brush B,having ence 0f two witnesses, this .(1th day ef Octoits ends encircling the flanges on the headber, 1889. plates and held to said anges by jam-screws,

5 the sleeve G, and the brace-rods g, snbstan- Witnesses:

THOMAS BURKE.

tiaily as set forth. EDWD. P. STEERS, n

In testimony that I elailn the foregoing as ANTONIO RASINES. 

